Barbell jack



FIG. 1 of the drawings is a rear, left, top perspective view of a barbell jack showing our new design;

FIG. 2 of the drawings is a bottom, right, front perspective view thereof;

FIG. 3 of the drawings is a front view thereof;

FIG. 4 of the drawings is a rear view thereof;

FIG. 5 of the drawings is a left side view thereof;

FIG. 6 of the drawings is a right side view thereof;

FIG. 7 of the drawings is a top view thereof;

FIG. 8 of the drawings is a bottom view thereof; and,

FIG. 9 of the drawings is a rear, left, top perspective view of the barbell jack shown in exemplary use holding a barbell.

The even-length broken lines depicting the remainder of the barbell jack show portions forming no part of the claimed design. 

CLAIM The ornamental design for a barbell jack, as shown and described. 